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在控制器之间传递参数JavaFX FXML

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我正在用JavaFX制作歌曲库，并且需要有关我的编辑功能的帮助。从列表视图中选择一首歌曲后，我想切换到新场景，并将旧歌曲的数据加载到文本字段（歌曲名称，艺术家等）中，但是我总是以空值结尾。我尝试通过解决方案here，但仍然无法使其正常工作。

这是我的代码（由于无效，我在editPromptController中清空了初始化）：

package jFiles.Controllers;

import jFiles.Main;
import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.event.actionEvent;
import javafx.event.EventHandler;
import javafx.scene.control.Label;
import javafx.scene.control.SplitPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;
import javafx.stage.StageStyle;
import javafx.util.Duration;
import resources.data.songData;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.*;

public class libraryController {


    public Button add_button;
    public Button edit_button;
    public Button delete_button;
    public SplitPane wholeWindow;


    private ObservableList<String> observable_track_list = FXCollections.observableArrayList();
    public AnchorPane songSideBar;
    @FXML
    public ListView<String> song_list = new ListView<>();

    private ArrayList<String> listed_tracks = new ArrayList<>();

    public Label song_label;
    public Label artist_label;
    public Label album_label;
    public Label year_label;

    private File file = new File("src/resources/data/songData.txt");
    private File detailsFile = new File("src/resources/data/songDetails.txt");

    // Takes user to the "add a song" prompt

    public void add_song(MouseEvent mouseEvent) throws IOException {

        Parent addRoot = FXMLLoader.load(Objects.requireNonNull(getclass().getclassLoader().getResource("resources/views/add_prompt.fxml")));
        Scene add_song = new Scene(addRoot);

        Stage add_song_prompt = (Stage) ((Node) mouseEvent.getsource()).getScene().getWindow();
        add_song_prompt.setScene(add_song);
        add_song_prompt.show();
    }

    // Takes user to the "edit song" prompt

    public void edit_song(MouseEvent mouseEvent) throws IOException {
        Parent editRoot = FXMLLoader.load(Objects.requireNonNull(getclass().getclassLoader().getResource("resources/views/edit_prompt.fxml")));
        Scene edit_song = new Scene(editRoot);

        Stage edit_song_prompt = (Stage) ((Node) mouseEvent.getsource()).getScene().getWindow();

        edit_song_prompt.setScene(edit_song);
        edit_song_prompt.show();

    }

    public void delete_song(MouseEvent mouseEvent) throws IOException {
    }

    // Scans through the text file (mock database) containing the listed tracks

    private void scanFile() throws FileNotFoundException {
        Scanner scan = new Scanner(file);
        song_list.setItems(observable_track_list);

        while (scan.hasnextLine()) {
            String song = scan.nextLine();
            if (!listed_tracks.contains(song)) {
                observable_track_list.add(song);
                listed_tracks.add(song);
                 }
            }

        Collections.sort(observable_track_list);
        }

    // Scans through,parses,and returns the full details of the selected track

    private String[] getDetails(String selected) throws FileNotFoundException {
        Scanner scan = new Scanner(detailsFile);
        String[] details = new String[4];

        while (scan.hasnextLine()) {
            String song_line = scan.nextLine();

            if (song_line.contains(selected)) {
                details = song_line.split(" - ");
            }
        }

        return details;
    }

    // Returns the existing tracks

    public ArrayList<String>  getList() throws FileNotFoundException {
        scanFile();
        return listed_tracks;
    }

    // Loads the existing tracks

    @FXML
    public void initialize() throws FileNotFoundException {
        scanFile();
        song_list.getSelectionmodel().select(0);
        fill_in_details();
     }

     // Loads the details of the selected song in the main display

    private void fill_in_details() throws FileNotFoundException {
        String[] details = getDetails(song_list.getSelectionmodel().getSelectedItem());

        song_label.setText(details[0]);
        artist_label.setText(details[1]);
        album_label.setText(details[2]);
        year_label.setText(details[3]);
    }

    public void item_selection(MouseEvent mouseEvent) throws FileNotFoundException {
        fill_in_details();
        System.out.println(song_list.getSelectionmodel().getSelectedItem());
    }
}

package jFiles.Controllers;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.input.MouseEvent;
import javafx.stage.Stage;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Objects;

public class editPromptController {

    public TextField song_name;
    public TextField artist_name;
    public TextField album_name;
    public TextField song_year;

    public void edit(MouseEvent mouseEvent) {
        //libraryController test = new libraryController();
        //System.out.println(test.song_list.getSelectionmodel().getSelectedItem());
    }

    public void cancel(MouseEvent mouseEvent) throws IOException {

        Parent libraryRoot = FXMLLoader.load(Objects.requireNonNull(getclass().getclassLoader().getResource("resources/views/libraryDisplay.fxml")));
        Scene library = new Scene(libraryRoot);

        Stage libraryWindow = (Stage) ((Node) mouseEvent.getsource()).getScene().getWindow();
        libraryWindow.setScene(library);
        libraryWindow.show();
    }

    @FXML
    public void initialize() throws FileNotFoundException {

    }
}

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane minHeight="400.0" minWidth="600.0" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="jFiles.Controllers.libraryController">
   <children>
      <SplitPane fx:id="wholeWindow" dividerPositions="0.29797979797979796" prefHeight="400.0" prefWidth="600.0">
        <items>
          <AnchorPane fx:id="songSideBar" minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
               <children>
                  <Label prefHeight="50.0" prefWidth="175.0" text="                 Song List" />
                  <ListView fx:id="song_list" layoutY="50.0" onmouseclicked="#item_selection" prefHeight="300.0" prefWidth="175.0" />
                  <Button fx:id="add_button" layoutX="14.0" layoutY="359.0" mnemonicParsing="false" onmouseclicked="#add_song" text="Add" />
                  <Button fx:id="edit_button" layoutX="69.0" layoutY="359.0" mnemonicParsing="false" onmouseclicked="#edit_song" text="Edit" />
                  <Button fx:id="delete_button" layoutX="117.0" layoutY="359.0" mnemonicParsing="false" onmouseclicked="#delete_song" text="Delete" />
               </children>
            </AnchorPane>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
               <children>
                  <Label layoutX="30.0" layoutY="30.0" text="NOW PLAYING:" />
                  <Pane layoutX="160.0" layoutY="120.0" prefHeight="190.0" prefWidth="157.0">
                     <children>
                        <Label fx:id="song_label" layoutX="65.0" layoutY="6.0" text="Label" />
                        <Label fx:id="artist_label" layoutX="65.0" layoutY="62.0" text="Label" />
                        <Label fx:id="album_label" layoutX="65.0" layoutY="115.0" text="Label" />
                        <Label fx:id="year_label" layoutX="65.0" layoutY="168.0" text="Label" />
                     </children></Pane>
                  <Label layoutX="112.0" layoutY="126.0" text="Song:" />
                  <Label layoutX="113.0" layoutY="182.0" text="Artist:" />
                  <Label layoutX="114.0" layoutY="235.0" text="Album:" />
                  <Label layoutX="119.0" layoutY="289.0" text="Year:" />
               </children></AnchorPane>
        </items>
      </SplitPane>
   </children>
</AnchorPane>

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="jFiles.Controllers.editPromptController">
    <children>
        <TextField fx:id="song_name" layoutX="211.0" layoutY="96.0" />
        <TextField fx:id="artist_name" layoutX="211.0" layoutY="152.0" />
        <TextField fx:id="album_name" layoutX="211.0" layoutY="203.0" promptText="Optional" />
        <TextField fx:id="song_year" layoutX="211.0" layoutY="261.0" promptText="Optional" />
        <Label layoutX="126.0" layoutY="100.0" text="Song Name:" />
        <Label layoutX="159.0" layoutY="156.0" text="Artist:" />
        <Label layoutX="152.0" layoutY="207.0" text="Album:" />
        <Label layoutX="161.0" layoutY="265.0" text="Year:" />
        <Button fx:id="edit_button" layoutX="192.0" layoutY="320.0" mnemonicParsing="false" onmouseclicked="#edit" text="Submit Edit" />
        <Button fx:id="cancel_button" layoutX="334.0" layoutY="320.0" mnemonicParsing="false" onmouseclicked="#cancel" text="Cancel" />
    </children>
</AnchorPane>

iCMS 回答：在控制器之间传递参数JavaFX FXML
暂时没有好的解决方案，如果你有好的解决方案，请发邮件至：iooj@foxmail.com
fxmljavajavafxuser-interface
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